Front Bumper Assembly and Cleaning Robot

ABSTRACT

The disclosure belongs to the technical field of intelligent household equipment, and provides to a front bumper assembly and a cleaning robot. The front bumper assembly includes a bumper body and two elastic pieces, the two elastic pieces are disposed at the rear ends of two sides of the bumper body, each of the elastic pieces is of an integrally formed structure and is provided with a first elastic portion and a second elastic portion which are abutted against the bumper body, the first elastic portion is configured for receiving first pressure applied by the bumper body, and is able to apply a first counterforce to the bumper body, the second elastic portion is configured for receiving a second pressure applied by the bumper body, and is able to apply a second counterforce to the bumper body, the first pressure is a pressure in an advancing direction of the cleaning robot, and the second pressure is a lateral pressure perpendicular to or arranged at an acute angle with the advancing direction. The disclosure further provides a cleaning robot. According to the front bumper assembly and the cleaning robot, the number of needed elastic pieces is small, the occupied space is small, and the manufacturing cost is low.

CROSS-REFERENCE TO RELATED APPLICATION

The disclosure claims the priority to Chinese Patent Application No. CN2021111649876.5, filed to the Chinese Patent Office on Dec. 30, 2021 and entitled “Front Bumper Assembly and Cleaning Robot”, which is incorporated in its entirety herein by reference.

TECHNICAL FIELD

The disclosure belongs to a technical field of intelligent household equipment, and particularly relates to a front bumper assembly and a cleaning robot.

BACKGROUND

A cleaning robot, also called a floor sweeping robot, an automatic cleaner, an intelligent dust collector, or a robot dust collector, etc., is one of intelligent household appliances, and can automatically complete floor cleaning work in a room. The cleaning robot generally includes a main body of the cleaning robot, a front bumper assembly and a collision detection mechanism, and the front bumper assembly and the collision detection mechanism are mounted at the front end of the main body of the cleaning robot and cooperate with each other to detect whether the cleaning robot collides with an obstacle or not in the cleaning process of the cleaning robot.

The front bumper assembly includes a bumper body and a rebound structure disposed between the bumper body and a main body of the cleaning robot. However, the rebound structure has many parts, occupies a relatively large structural space and is high in manufacturing cost.

SUMMARY

An objective of the disclosure is to provide a front bumper assembly and a cleaning robot, for solving the technical problem that in the prior art, a rebound structure has many parts, occupies a relatively large structural space and is high in manufacturing cost.

The disclosure is implemented as follows: in a first aspect, a front bumper assembly is provided, which is applied to a cleaning robot and includes a bumper body and two elastic pieces, the two elastic pieces are disposed at rear ends of two sides of the bumper body, each of the elastic pieces is of an integrally formed structure and is provided with a first elastic portion and a second elastic portion which are abutted against the bumper body, the first elastic portion is configured for receiving first pressure applied by the bumper body, and is able to apply a first counterforce opposite to the first pressure in direction to the bumper body, the second elastic portion is configured for receiving a second pressure applied by the bumper body, and is able to apply a second counterforce opposite to the second pressure in direction to the bumper body, the first pressure is a pressure in an advancing direction of the cleaning robot, and the second pressure is a lateral pressure perpendicular to or arranged at an acute angle with the advancing direction.

In an optional embodiment, the elastic piece includes a first bent portion, a spring portion and a second bent portion, which are connected in sequence, the first bent portion is configured for being connected with a main body of the cleaning robot, the spring portion defines the first elastic portion, and the second bent portion extends from an end portion of the spring portion to a lateral side of the spring portion to form the second elastic portion.

In an optional embodiment, the elastic piece includes a first bent portion and a second bent portion connected to each other, the first bent portion is configured for being connected with a main body of the cleaning robot, the second bent portion is a V-shaped structure with an opening facing a side where the first bent portion is located, the V-shaped structure defines the first elastic portion, and a free end of the V-shaped structure defines the second elastic portion.

In an optional embodiment, the first bent portion is a sleeving part mounted on the main body of the cleaning robot in a sleeving manner.

In an optional embodiment, the bumper body includes a transverse portion and longitudinal portions connected to two ends of the transverse portion respectively, a first limiting structure is provided at a free end of each longitudinal portion and includes a first limiting portion and a second limiting portion, the first limiting portion is disposed on an inner side wall of the longitudinal portion in a protruding mode, and is configured for abutting against the first elastic portion, and the second limiting portion is disposed on an end face of the longitudinal portion in a protruding mode in the length direction of the longitudinal portion and is configured for abutting against the second elastic portion.

In an optional embodiment, the first limiting structure further includes a supporting portion formed between the first limiting portion and the second limiting portion, and the supporting portion is configured for supporting the elastic piece.

In an optional embodiment, the first limiting portion, the second limiting portion and the supporting portion are all plate bodies, any two of which are perpendicular to each other.

In a second aspect, a cleaning robot is provided, which includes a main body of the cleaning robot, a collision detection mechanism mounted on the main body of the cleaning robot, and the front bumper assembly provided by the embodiments described above.

In an optional embodiment, main body of the cleaning robot includes a base and an upper housing mounted on the base, a mounting space is formed between the upper housing and the base, a part of the bumper body is located in the mounting space, another part protrudes out of the mounting space, the bumper body is able to move relative to the upper housing and the base within a preset range, and the collision detection mechanism and the elastic pieces are both fixedly mounted on the base and/or the upper housing.

In an optional embodiment, a second limiting structure and a third limiting structure are formed between the base and the upper housing, the second limiting structure is configured for limiting a moving range of the bumper body in a vertical direction, and the third limiting structure is configured for limiting a moving range of the bumper body in a horizontal plane.

In an optional embodiment, the second limiting structure includes a first protruding portion disposed on a lower surface of the upper housing in a protruding mode, a bottom face of the first protruding portion is lower than a bottom of the upper housing, and the bottom face of the first protruding portion abuts against an upper surface of the base.

Or, the second limiting structure includes a first protruding portion disposed on an upper surface of the base in a protruding mode, a top face of the first protruding portion is higher than a top face of the base, and the top face of the first protruding portion abuts against a lower surface of the upper housing.

In an optional embodiment, the bumper body is provided with a receiving hole for the first protruding portion to penetrate through.

In an optional embodiment, the third limiting structure includes a limiting plate and a second protruding portion, the limiting plate is located on an inner side of the bumper body and connected with the bumper body, a through hole is provided in a middle of the limiting plate, the second protruding portion is disposed on the lower surface of the upper housing or the upper surface of the base in a protruding mode, and at least part of the second protruding portion is located in the through hole; and a cross sectional area of the through hole is larger than a cross sectional area of the part, located in the through hole, of the second protruding portion.

In an optional embodiment, a third protruding portion configured for supporting the bumper body is provided on the upper surface of the base.

Compared with the prior art, the disclosure has the beneficial effects that: for the front bumper assembly and the cleaning robot provided by the embodiments of the disclosure, the elastic pieces are only mounted at the rear ends of two sides of the bumper body respectively, a rebound structure mounted on the front side face of the bumper body is cancelled, and meanwhile, each of the elastic pieces is integrally formed and provided with the first elastic portion and the second elastic portion. By means of the elastic pieces, rebound of the bumper body in the front-back direction and rebound of the bumper body in the left-right direction can be realized through the two elastic pieces, therefore, the number of the elastic pieces can be effectively reduced on the basis that normal functions are guaranteed, assembly is simplified, and meanwhile, the manufacturing cost of the front bumper assembly and the manufacturing cost of the cleaning robot are effectively reduced. In addition, the elastic pieces in the embodiments of the disclosure are small in size, only occupy a little space at the left and right positions of the rear end of the bumper body, so that the structural space of the main body of the cleaning robot can be fully utilized, and the assembly is convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the technical solutions in the embodiments of the disclosure more clearly, the drawings required to be used in descriptions about the embodiments or the relevant art will be simply introduced below, obviously, the drawings described below are only some embodiments of the disclosure, and other drawings can further be obtained by those of ordinary skill in the art according to the drawings without creative work.

FIG. 1 is a schematic structure diagram of a top view of a front bumper assembly provided by an embodiment of the disclosure.

FIG. 2 is a schematic structure diagram of a top view of a front bumper assembly provided by another embodiment of the disclosure.

FIG. 3 is a schematic structure diagram of a cleaning robot adopting a front bumper assembly as shown in FIG. 1 , and an upper housing is not shown in the figure.

FIG. 4 is a schematic structure diagram of an exploded view of a cleaning robot as shown in FIG. 3 .

FIG. 5 is a schematic structure diagram of an elastic piece adopted in an embodiment of the disclosure.

FIG. 6 is a schematic structure diagram of an elastic piece adopted in another embodiment of the disclosure.

FIG. 7 is a schematic structure diagram of a bumper body adopted by an embodiment of the disclosure.

FIG. 8 is a schematic structure diagram of a first limiting structure as shown in FIG. 7 .

FIG. 9 is a schematic structure diagram of a cleaning robot provided by an embodiment of the disclosure.

FIG. 10 is a partial schematic diagram of a cross-sectional view of a cleaning robot as shown in FIG. 9 .

FIG. 11 is an enlarged partial schematic diagram of Ain FIG. 10 .

FIG. 12 is an enlarged partial schematic diagram of B in FIG. 10 .

FIG. 13 is an enlarged partial schematic diagram of C in FIG. 3 .

FIG. 14 is an enlarged partial schematic diagram of D in FIG. 4 .

FIG. 15 is a schematic structure diagram of a cleaning robot provided by an embodiment of the disclosure.

DESCRIPTION OF REFERENCE NUMERALS

100. Bumper body; 110. Transverse portion; 120. Longitudinal portion; 130. Receiving hole; 140. Fourth protruding portion; 200. Elastic piece; 210. First bent portion; 220. Spring portion; 230. Second bent portion; 250. First elastic portion; 260. Second elastic portion; 300. First limiting structure; 310. First limiting portion; 320. Second limiting portion; 330. Supporting portion; 500. Main body of a cleaning robot; 510. Base; 520. Upper housing; 530. Mounting space; 540. Third protruding portion; 700. First protruding portion; 800. Third limiting structure; 810. Limiting plate; 820. Through hole; 830. Second protruding portion; F1. First counterforce; and F2. Second counterforce.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of the disclosure will be described in detail below, examples of which are illustrated in the drawings, in which like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by reference to the drawings are exemplary only for explaining the disclosure and are not to be understood as limiting the disclosure.

In the description of the disclosure, it is to be understood that orientation or position relationships indicated by terms “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, and the like are orientation or position relationships shown in the drawings, are adopted not to indicate or imply that indicated devices or components must be in specific orientations or structured and operated in specific orientations but only to conveniently and simply describe the disclosure and thus should not be understood as limits to the disclosure.

In addition, terms “first” and “second” are only adopted for description and should not be understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, a feature defined by “first” and “second” may explicitly or implicitly indicate inclusion of at least one such feature. In the description of the disclosure, “plurality” means two or more, unless otherwise limited definitely and specifically.

In the disclosure, unless otherwise definitely specified and limited, terms “install”, “mutually connect”, “connect”, “fix” and the like should be broadly understood. For example, the terms may refer to fixed connection and may also refer to detachable connection or integration. The terms may refer to mechanical connection and may also refer to electrical connection. The terms may refer to direct mutual connection, may also refer to indirect connection through a medium and may refer to communication in two components or an interaction relationship of the two components. For those of ordinary skill in the art, specific meanings of these terms in the disclosure can be understood according to a specific condition.

In order to make the purpose, technical solutions and advantages of the disclosure clearer, the disclosure will be further described below in combination with the drawings and embodiments.

Referring to FIGS. 1-6 , in the embodiments of the disclosure, a front bumper assembly is provided, which is applied to a cleaning robot. The front bumper assembly includes a bumper body 100 and elastic pieces 200. Two elastic pieces 200 are provided, which are disposed at rear ends of two sides of the bumper body 100. Each of the elastic pieces 200 is of an integrally formed structure and is provided with a first elastic portion 250 and a second elastic portion 260 which are abutted against the bumper body 100. The first elastic portion 250 is configured for receiving first pressure applied by the bumper body 100, and is able to apply a first counterforce F1 opposite to the first pressure in direction to the bumper body 100. The second elastic portion 260 is configured for receiving second pressure applied by the bumper body 100, and is able to apply a second counterforce F2 opposite to the second pressure in direction to the bumper body 100. The first pressure is a pressure in an advancing direction of the cleaning robot, and the second pressure is a lateral pressure perpendicular to or arranged at an acute angle with the advancing direction. Specifically, the first pressure is force in the front-back direction received by the bumper body 100, and the second pressure is force in the left-right direction received by the bumper body 100.

It is to be noted that in the embodiment and the following embodiments, according to the XYZ rectangular coordinate system established in FIG. 3 , the side located in the positive direction of the X axis is defined as front, and the side located in the negative direction of the X axis is defined as rear; the side located in the positive direction of the Y axis is defined as left, and the side located in the negative direction of the Y axis is defined as right; and the side located in the positive direction of the Z axis is defined as upper, and the side located in the negative direction of the Z axis is defined as lower.

The rebound principle of the front bumper assembly provided by the embodiment is as follows.

During use, the bumper body 100 and the elastic pieces 200 in the front bumper assembly are respectively mounted on a main body of the cleaning robot, so that the bumper body 100 has the freedom degree capable of moving front and back and left and right relative to the main body 500 of the cleaning robot, and the elastic pieces 200 are fixedly mounted on the main body 500 of the cleaning robot, and abutted against the inner wall of the bumper body 100 through the first elastic portion 250 and the second elastic portion 260.

When the cleaning robot is in operation and encounters an obstacle, the front bumper assembly first contacts the obstacle due to the fact that the front bumper assembly is located at the front end of the main body 500 of the cleaning robot, and approaches the main body 500 of the cleaning robot under pushing of the obstacle to trigger a collision detection mechanism 600 located on the main body 500 of the cleaning robot.

In the process, if the contact area of the obstacle and the bumper body 100 is the front surface of the bumper body 100, the direction of the pushing force received by the bumper body 100 is in the advancing direction of the cleaning robot, in such a case, the first elastic portion 250 in the elastic piece 200 receives first pressure corresponding to the pushing force to generate deformation, and applies a first counterforce F1 opposite to the first pressure in direction to the bumper body 100.

If the contact area of the obstacle and the bumper body 100 is the left side of the bumper body 100, in such a case, the direction of the pushing force received by the bumper body 100 is perpendicular to or arranged at an acute angle with the advancing direction of the cleaning robot, the second elastic portion 260 in the elastic piece 200 located on the left side of the bumper body 100 receives second pressure corresponding to the pushing force to generate deformation, and applies a second counterforce F2 towards the left side to the bumper body 100.

If the contact area of the obstacle and the bumper body 100 is the right side of the bumper body 100, in such a case, the direction of the pushing force received by the bumper body 100 is perpendicular to or arranged at an acute angle with the advancing direction of the cleaning robot, the second elastic portion 260 in the elastic piece 200 located on the right side of the bumper body 100 receives second pressure corresponding to the pushing force to generate deformation, and applies a second counterforce F2 towards the right side to the bumper body 100.

The first counterforce F1 and the second counterforce F2 are respectively configured for enabling the bumper body 100 and the main body 500 of the cleaning robot to be kept within a preset distance when the bumper body 100 does not receive external pushing force, and further configured for pushing the bumper body 100 to return to the original position when the external pushing force is withdrawn.

It is to be noted that in the above steps, in the initial state, the first elastic portion 250 and the second elastic portion 260 in the elastic piece 200 can only contact the bumper body 100, but do not apply acting force to the bumper body 100; or, the first elastic portion 250 and the second elastic portion 260 are in a pre-pressed state in the initial state, and the first counterforce F1 and the second counterforce F2 are applied to the bumper body 100, so that a preset distance is kept between the bumper body 100 and the main body 500 of the cleaning robot.

For the front bumper assembly provided by the embodiment of the disclosure, the elastic pieces 200 are only mourned at the rear ends of two sides of the bumper body 100 respectively, a rebound structure mounted on the front side face of the bumper body 100 is cancelled, and meanwhile, each of the elastic piece 200 is integrally formed and provided with the first elastic portion 250 and the second elastic portion 260. By means of the elastic pieces 200, rebound of the bumper body 100 in the front-back direction and rebound of the bumper body 100 in the left-right direction can be realized through the two elastic pieces, therefore, the number of the elastic pieces 200 can be effectively reduced on the basis that normal functions are guaranteed, assembly is simplified, and meanwhile, the manufacturing cost of the front bumper assembly and the manufacturing cost of the cleaning robot are effectively reduced. In addition, the elastic pieces 200 in the embodiment are small in size, only occupies a little space at the left and right positions of the rear end of the bumper body 100, so that the structural space of the main body 500 of the cleaning robot can be fully utilized when it is applied to the cleaning robot, and meanwhile, the assembly is convenient.

Referring to FIG. 5 , in an optional embodiment, the elastic piece 200 is formed by bending a strip-shaped piece, and includes a first bent portion 210, a spring portion 220 and a second bent portion 230, which are connected in sequence. The first bent portion 210 is configured for being connected with the main body of the cleaning robot. The second bent portion 230 extends from the end portion of the spring portion 220 to the lateral side of the spring portion 220 to form the second elastic portion 260. The spring portion 220 defines the first elastic portion 250. Specifically, the end, away from the spring portion 220, of the second bent portion 230 is suspended. Therefore, when the second bent portion 230 receives lateral pressure which is transmitted by the bumper body 100 and is perpendicular to or arranged at an acute angle with the advancing direction, bending can occur, energy is stored, and a second counter force F2 is applied to the bumper body 100. By adoption of the structure provided by the embodiment, the elastic piece 200 is simple, compact and stable in structure, convenient to mount, low in manufacturing cost and multi-purpose.

Referring to FIG. 6 , in an optional embodiment, the elastic piece 200 is formed by bending a sheet body and includes a first bent portion 210 and a second bent portion 230 connected to each other, the first bent portion 210 is configured for being connected with the main body of the cleaning robot, the second bent portion 230 is a V-shaped structure with an opening facing the side where the first bent portion 210 is located, the V-shaped structure defines the first elastic portion 250, and the free end of the V-shaped structure defines the second elastic portion 260.

Specifically, the V-shaped structure body has deformation capacity of stretching and contracting in a first direction and also has deformation capacity of rotating within a preset angle around connecting point 270 of V-shaped structure body and a connecting portion. During use, the vertex angle and the free end of the V-shaped structure contact the bumper body 100 respectively, and when the bumper body 100 receives pushing force in the advancing direction, the pushing force is conducted to the vertex angle of the V-shaped structure to push the whole V-shaped structure to be bent inwards around the connecting point 270 between the V-shaped structure and the connecting portion, and the V-shaped structure then stores energy by deformation and applies the first counterforce F1 to the bumper body 100. When the elastic piece 200 receives a pushing force, namely, lateral pressure, perpendicular to or arranged at an acute angle with the advancing direction, the free end of the V-shaped structure contracts inwards and stores energy and applies the second counterforce F2 to the bumper body 100.

By adoption of the structure provided by the embodiment, the elastic piece 200 is simple, compact and stable in structure, convenient to mount, low in manufacturing cost and multi-purpose.

Furthermore, in an optional embodiment, the sheet body used by the elastic piece 200 in the above embodiment is an irregular sheet body, and the width of the area corresponding to the first bent portion 210 is larger than the width of the area corresponding to the second bent portion 230, so that the contact area between the first bent portion 210 and the main body 500 of the cleaning robot is large enough, and therefore, the elastic piece 200 can be stably connected with the cleaning robot. Meanwhile, the size of the sheet body in the corresponding areas of the first elastic portion 250 and the second elastic portion 260 is small, bending and rebound of the sheet body are facilitated, and the use requirements are met.

In an optional embodiment, the first bent portion 210 in the embodiments is a sleeving part mounted on the main body of the cleaning robot in a sleeving manner. By adoption of the structure provided by the embodiment, the first bent portion 210 can be conveniently connected with the main body of the cleaning robot, the connecting structure is stable, and the assembly efficiency of the elastic piece 200 and the main body of the cleaning robot can be effectively improved.

Referring to FIG. 7 and FIG. 8 , in an optional embodiment, the bumper body 100 includes a transverse portion 110 and longitudinal portions 120 connected to two ends of the transverse portion 110 respectively, a first limiting structure 300 is formed at the free end of each longitudinal portion 120 and includes a first limiting portion 310 and a second limiting portion 320, the first limiting portion 310 is disposed on the inner side wall of the longitudinal portion 120 in a protruding mode, and is configured for abutting against the first elastic portion 250, and the second limiting portion 320 is disposed on the end face of the longitudinal portion 120 in the length direction of the longitudinal portion 120 and is configured for abutting against the second elastic portion 260.

By adoption of the structure provided by the embodiment, the bumper body 100 is simple in structure, fixing with the relative positions of the first elastic portion 250 and the second elastic portion 260 can be realized, the phenomenon that the rebound effect is affected due to the fact that contact points of the first elastic portion 250 and/or the second elastic portion 260 and the bumper body 100 deviate greatly in the using process is avoided, and further, the stability of the working performance of the front bumper assembly is ensured.

Referring to FIG. 7 and FIG. 8 , in an optional embodiment, the first limiting structure 300 further includes a supporting portion 330 formed between the first limiting portion 310 and the second limiting portion 320, and the supporting portion 330 is configured for supporting the elastic piece 200. Specifically, the supporting portion 330 may be a plate body, a block body, a rod body, or the like that connects the first limiting portion 310 and the second limiting portion 320, as long as the support of the elastic piece 200 can be realized, without being exclusively limited herein. Due to the arrangement of the supporting portion 330, the relative position of the elastic piece 200 and the bumper body 100 in the vertical direction are prevented from deviating in the carrying or using process, and the stability of the working performance of the front bumper assembly is further improved.

In a specific embodiment, the first limiting portion 310, the second limiting portion 320, and the supporting portion 330 are three mutually perpendicular plate bodies. The first elastic portion 250 and the second elastic portion 260 in the elastic piece 200 are both located in a space defined by the three plate bodies. Therefore, the first elastic portion 250 and the second elastic portion 260 have large contact areas with the corresponding limiting portions respectively, and further, the stability of the working performance of the front bumper assembly is guaranteed. Meanwhile, the contact area between the supporting portion 330 and the elastic piece 200 is large, and stable supporting of the elastic piece 200 can be realized.

Furthermore, the supporting portion 330 is connected with the middle part of the first limiting portion 310 and the middle part of the second limiting portion 320, so that the acting parts of the elastic piece 200 with the first limiting portion 310 and the second limiting portion 320 are limited to the middle part and the upper part of the first limiting portion 310 and the second limiting portion 320.

Referring to FIG. 9 and FIG. 15 , in another embodiment of the disclosure, a cleaning robot is provided, which includes a main body 500 of the cleaning robot, a collision detection mechanism 600 mounted on the main body 500 of the cleaning robot, and the front bumper assembly 100 provided by the embodiments described above. The cleaning robot in the embodiment can be a D-shaped cleaning robot or other types of cleaning robots as long as the front bumper assembly 100 provided by the corresponding embodiment can be applied, without being exclusively limited herein.

Specifically, with reference to FIG. 7 and FIG. 15 , a fourth protruding portion 140 for contacting the collision detection mechanism 600 is disposed on the inner side wall of the bumper body 100 in a protruding mode. When the bumper body 100 is subjected to an external pushing force, the bumper body 100 moves towards the direction of the main body of the cleaning robot 500, and during this time, the fourth protruding portion 140 contacts and presses the collision detection mechanism 600 to trigger the collision detection mechanism 600.

The cleaning robot provided by the embodiment of the disclosure adopts the front bumper assembly provided by the embodiments described above, rebound of the bumper body 100 in the front-back direction and rebound of the bumper body 100 in the left-right direction can be realized through small number of the elastic pieces, therefore, the number of the elastic pieces 200 can be effectively reduced on the basis that normal functions are guaranteed, assembly is simplified, and meanwhile, the manufacturing cost of the front bumper assembly and the manufacturing cost of the cleaning robot are effectively reduced. In addition, the elastic pieces 200 in the embodiment are small in size, only occupies a little space at the left and right positions of the rear end of the bumper body 100, thus the structural space of the main body of the cleaning robot 500 can be fully utilized, and the assembly is convenient.

Referring to FIG. 10 , in an optional embodiment, the main body 500 of the cleaning robot includes a base 510 and an upper housing 520 mounted on the base 510, a mounting space 530 is formed between the upper housing 520 and the base 510, a part of the bumper body 100 is located in the mounting space 530, another part protrudes out of the mounting space 530. Generally, the bumper body 100 protrudes more than 3 mm from the front surface of the upper housing 520. The bumper body 100 can move relative to the upper housing 520 and the base 510 within a preset range. The collision detection mechanism 600 and the elastic piece 200 are both fixedly mounted on the base 510 and/or the upper housing 520.

Specifically, the bumper body 100 is movably mounted between the upper housing 520 and the base 510 and can move in a certain range in the up-down direction, the front-back direction and the left-right direction relative to the upper housing 520 and the base 510, that is, the bumper body 100 moves within the preset range. The preset range can be set according to specific use requirements, without being exclusively limited herein.

The bumper body 100, the collision detection mechanism 600 and the elastic piece 200 can be connected with one of the base 510 and the upper housing 520 respectively or can be connected with both of the base 510 and the upper housing 520, and can be selected flexibly according to mounting and use requirements, without being exclusively limited herein. The bumper body 100 is mounted on the main body 500 of the cleaning robot by adopting the structure provided by the embodiment and can move within a preset range, so that the risk of damage during collision can be reduced, and the stability of the working performance is guaranteed.

Referring to FIGS. 10-13 , in an optional embodiment, a second limiting structure and a third limiting structure 800 are formed between the base 510 and the upper housing 520, the second limiting structure is configured for limiting the moving range of the bumper body 100 in the vertical direction (namely, the up-down direction), and the third limiting structure 800 is configured for limiting the moving range of the bumper body 100 in the horizontal plane.

Specifically, the third limiting structure 800 can be configured for limiting the moving range of the bumper body 100 in the front-back direction and the left-right direction. By means of the structure provided by the embodiment, the moving ranges of the bumper body 100 in the vertical direction and the horizontal plane can be limited respectively, and machining and design are easy.

In an optional embodiment, as shown in FIG. 11 , the second limiting structure includes a first protruding portion 700 disposed on the lower surface of the upper housing 520 in a protruding mode, the bottom face of the first protruding portion 700 is lower than that of the upper housing 520, and the bottom face of the first protruding portion 700 abuts against the upper surface of the base 510.

Or, as shown in FIG. 12 , the second limiting structure includes a first protruding portion 700 disposed on the upper surface of the base 510 in a protruding mode, the top face of the first protruding portion 700 is higher than the top face of the base 510, and the top face of the first protruding portion 700 abuts against the lower surface of the upper housing 520.

Specifically, the first protruding portion 700 may be a cylinder, a block, a cone, or the like, and may be set according to use requirements, without being exclusively limited herein. After assembly, the mounting space 530 is formed between the upper housing 520 and the base 510 under the supporting action of the first protruding portion 700. The whole structure is simple and convenient to assemble.

Referring to FIGS. 1-4 and FIG. 7 , in an optional embodiment, the bumper body 100 is provided with a receiving hole 130 for the first protruding portion 700 to penetrate through. During mounting, the first protruding portion 700 penetrates through the receiving hole 130 to abut against the upper housing 520 or the base 510 located on the opposite side. Therefore, the bumper body 100 can be limited between the upper housing 520 and the base 510 through the first protruding portion 700, other structures are not needed, so that the cleaning robot is simple in overall structure and convenient to assemble.

Referring to FIGS. 1-4 and FIG. 13 , in an optional embodiment, the third limiting structure 800 includes a limiting plate 810 and a second protruding portion 830. The limiting plate 810 is located on the inner side of the bumper body 100 and connected with the bumper body 100, and a through hole 820 is formed in the middle of the limiting plate 810. Specifically, the plate surface of the limiting plate 810 is parallel to the horizontal plane or is arranged at an acute angle with the horizontal plane. The size of the through hole 820 is large.

The second protruding portion 830 is disposed on the lower surface of the upper housing 520 or the upper surface of the base 510 in a protruding mode, and at least part of the second protruding portion 830 is located in the through hole 820. The cross-sectional area of the through hole 820 is greater than the cross-sectional area of the part, located in the through hole 820, of the second protruding portion 830.

When the bumper body 100 is subjected to external force, the limiting plate 810 can be driven to move relative to the second protruding portion 830, so that the second protruding portion 830 is able to move in the through hole 820, and the movement can be front-back movement or left-right movement. When the inner wall of the through hole 820 abuts against the second protruding portion 830, the bumper body 100 cannot continue to move inwards under the blocking of the second protruding portion 830, so that the phenomenon that the base 510 or the upper housing 520 is damaged when the bumper body 100 is subjected to large external pushing force is avoided, and the stability of the overall structure of the cleaning robot is effectively improved.

In a specific embodiment, the front ends of the upper housing 520 and the base 510 are connected by bolts, and the first protruding portion 700 and second protruding portion 830 are bolt studs, respectively. Therefore, the first protruding portion 700 and the second protruding portion 830 can have multiple functions respectively, the number of protruding portions on the upper housing 520 and the base 510 is reduced, and therefore, the production cost is reduced.

In order to reduce friction force between the bumper body 100 and the base 510 when the bumper body 100 moves relative to the base 510, referring to FIG. 14 , in an optional embodiment, a third protruding portion 540 configured for supporting the bumper body 100 is formed on the upper surface of the base 510. Specifically, the third protruding portion 540 may be a bead, a bump, or the like, and may be selected according to design needs, without being exclusively limited herein. By adoption of the cleaning robot provided by the embodiment, the contact area of the bumper body 100 for the base 510 can be effectively reduced, the friction force of movement of the bumper body 100 relative to the base 510 is reduced, and the rebound flexibility of the bumper body 100 is improved.

The foregoing is merely the preferred embodiments of the present disclosure and has only described in detail the technical principles of the present disclosure, and these descriptions are merely for the purpose of explaining the principles of the present disclosure and are not to be construed in any way as limiting the scope of protection of the present disclosure. Based on the explanations herein, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the disclosure and other specific implementation modes apparent to the skilled in the part without creative work shall fall within the scope of protection of the disclosure. 

What is claimed is:
 1. A front bumper assembly, applied to a cleaning robot, comprising a bumper body and two elastic pieces, the two elastic pieces are disposed at rear ends of two sides of the bumper body, each of the elastic pieces is of an integrally formed structure and is provided with a first elastic portion and a second elastic portion which are abutted against the bumper body, the first elastic portion is configured for receiving first pressure applied by the bumper body, and is able to apply a first counterforce opposite to the first pressure in direction to the bumper body, the second elastic portion is configured for receiving second pressure applied by the bumper body, and is able to apply a second counterforce opposite to the second pressure in direction to the bumper body, the first pressure is a pressure in an advancing direction of the cleaning robot, and the second pressure is a lateral pressure perpendicular to or arranged at an acute angle with the advancing direction.
 2. The front bumper assembly as claimed in claim 1, wherein the elastic piece comprises a first bent portion, a spring portion and a second bent portion, which are connected in sequence, the first bent portion is configured for being connected with a main body of the cleaning robot, the spring portion defines the first elastic portion, and the second bent portion extends from an end portion of the spring portion to a lateral side of the spring portion to form the second elastic portion.
 3. The front bumper assembly as claimed in claim 1, wherein the elastic piece comprises a first bent portion and a second bent portion connected to each other, the first bent portion is configured for being connected with a main body of the cleaning robot, the second bent portion is a V-shaped structure with an opening facing a side where the first bent portion is located, the V-shaped structure defines the first elastic portion, and a free end of the V-shaped structure defines the second elastic portion.
 4. The front bumper assembly as claimed in claim 2, wherein the first bent portion is a sleeving part mounted on the main body of the cleaning robot in a sleeving manner.
 5. The front bumper assembly as claimed in claim 1, wherein the bumper body comprises a transverse portion and longitudinal portions connected to two ends of the transverse portion respectively, a first limiting structure is provided at a free end of each longitudinal portion and comprises a first limiting portion and a second limiting portion, the first limiting portion is disposed on an inner side wall of the longitudinal portion in a protruding mode, and is configured for abutting against the first elastic portion, and the second limiting portion is disposed on an end face of the longitudinal portion in a protruding mode in the length direction of the longitudinal portion and is configured for abutting against the second elastic portion.
 6. The front bumper assembly as claimed in claim 5, wherein the first limiting structure further comprises a supporting portion formed between the first limiting portion and the second limiting portion, and the supporting portion is configured for supporting the elastic piece.
 7. The front bumper assembly as claimed in claim 6, wherein the first limiting portion, the second limiting portion and the supporting portion are all plate bodies, any two of which are perpendicular to each other.
 8. A cleaning robot, comprising a main body of the cleaning robot, a collision detection mechanism mounted on the main body of the cleaning robot, and the front bumper assembly as claimed in claim
 1. 9. The cleaning robot as claimed in claim 8, wherein the main body of the cleaning robot comprises a base and an upper housing mounted on the base, a mounting space is formed between the upper housing and the base, a part of the bumper body is located in the mounting space, another part protrudes out of the mounting space, the bumper body is able to move relative to the upper housing and the base within a preset range, and the collision detection mechanism and the elastic pieces are both fixedly mounted on the base and/or the upper housing.
 10. The cleaning robot as claimed in claim 9, wherein a second limiting structure and a third limiting structure are formed between the base and the upper housing, the second limiting structure is configured for limiting a moving range of the bumper body in a vertical direction, and the third limiting structure is configured for limiting a moving range of the bumper body in a horizontal plane.
 11. The cleaning robot as claimed in claim 10, wherein the second limiting structure comprises a first protruding portion disposed on a lower surface of the upper housing in a protruding mode, a bottom face of the first protruding portion is lower than a bottom face of the upper housing, and the bottom face of the first protruding portion abuts against an upper surface of the base; or, the second limiting structure comprises a first protruding portion disposed on an upper surface of the base in a protruding mode, a top face of the first protruding portion is higher than a top face of the base, and the top face of the first protruding portion abuts against a lower surface of the upper housing.
 12. The cleaning robot as claimed in claim 11, wherein the bumper body is provided with a receiving hole for the first protruding portion to penetrate through.
 13. The cleaning robot as claimed in claim 10, wherein the third limiting structure comprises a limiting plate and a second protruding portion, the limiting plate is located on an inner side of the bumper body and connected with the bumper body, a through hole is provided in a middle of the limiting plate, the second protruding portion is disposed on the lower surface of the upper housing or the upper surface of the base in a protruding mode, and at least part of the second protruding portion is located in the through hole; and a cross sectional area of the through hole is larger than a cross sectional area of the part, located in the through hole, of the second protruding portion.
 14. The cleaning robot as claimed in claim 9, wherein a third protruding portion configured for supporting the bumper body is provided on the upper surface of the base.
 15. The front bumper assembly as claimed in claim 3, wherein the first bent portion is a sleeving part mounted on the main body of the cleaning robot in a sleeving manner.
 16. The front bumper assembly as claimed in claim 2, wherein the bumper body comprises a transverse portion and longitudinal portions connected to two ends of the transverse portion respectively, a first limiting structure is provided at a free end of each longitudinal portion and comprises a first limiting portion and a second limiting portion, the first limiting portion is disposed on an inner side wall of the longitudinal portion in a protruding mode, and is configured for abutting against the first elastic portion, and the second limiting portion is disposed on an end face of the longitudinal portion in a protruding mode in the length direction of the longitudinal portion and is configured for abutting against the second elastic portion.
 17. The cleaning robot as claimed in claim 8, wherein the elastic piece is formed by bending a strip-shaped piece, and comprises a first bent portion, a spring portion and a second bent portion, which are connected in sequence, the first bent portion is configured for being connected with a main body of the cleaning robot, the spring portion defines the first elastic portion, and the second bent portion extends from an end portion of the spring portion to a lateral side of the spring portion to form the second elastic portion.
 18. The cleaning robot as claimed in claim 8, wherein the elastic piece is formed by bending a sheet body and comprises a first bent portion and a second bent portion connected to each other, the first bent portion is configured for being connected with a main body of the cleaning robot, the second bent portion is a V-shaped structure with an opening facing a side where the first bent portion is located, the V-shaped structure defines the first elastic portion, and a free end of the V-shaped structure defines the second elastic portion.
 19. The cleaning robot as claimed in claim 8, wherein the first bent portion is a sleeving part mounted on the main body of the cleaning robot in a sleeving manner.
 20. The cleaning robot as claimed in claim 8, wherein the bumper body comprises a transverse portion and longitudinal portions connected to two ends of the transverse portion respectively, a first limiting structure is provided at a free end of each longitudinal portion and comprises a first limiting portion and a second limiting portion, the first limiting portion is disposed on an inner side wall of the longitudinal portion in a protruding mode, and is configured for abutting against the first elastic portion, and the second limiting portion is disposed on an end face of the longitudinal portion in a protruding mode in the length direction of the longitudinal portion and is configured for abutting against the second elastic portion. 